I currently have dual Bag End Infrasub-18's in my home theater. I started out with a single Sound Dynamics THS 15. Which I still have in my bedroom setup. When I first began to assemble my home theater and bought the Sound Dynamics off of Ebay, it had arrived not working. So I brought to a local audio repair center. It was taking longer than expected and I got irritated and ended up buying one of the Bag End subs while I waited. When I finally got the other one back the system sounded phenomenal. And after digging for information on both subs, I discovered that the Infrasub was a highly praised unit, and that the Sound Dynamics wasn't. Being new to home audio, that bit of information was what I used to determine which piece it was that made the system's bass sound as great as it did. So I ended up searching for another Infrasub and finding one. Moving the Sound Dynamics to my bedroom, I didn't give it much attention until recently. Anyway, with the dual Infrasub's I just wasn't getting the amount of air moving and body shaking bass that I was when I had the combination of different subs in the room. I couldn't figure out what the hell was going on? I tweeked and tweeked and tweeked my system in every imaginable configuration I could think of or Google. After much head scratching I gave up and didn't think about for a while. Well, recently I began to connect together my bedroom home theater setup with the aforementioned Sound Dynamics sub. Come to find out, it was the Sound Dynamics that was providing that heart murmur bass that I enjoy. I'm no audiophile, I love movies more than listening to music. So I'm sure I'll get people telling me that the Infrasub's are way better, but they're just not the type of bass that "I" prefer. And my goal is to make "me" happy. I've put my home theater together on a super tight budget within a year. Buying non-working equipment and having it fixed or trying my hand at fixing things myself(which has been very successful so far.) Scouring multiple buy & sell sites for months on end to find what I was looking for. Always keeping my eyes peeled for super deals that I can actually afford. And this was very disappointing. I have what many people consider great subs, but they just didn't produce the sound I wanted. I began thinking of spending more money. Which I really don't have, but I was so entrenched in this goal already that I couldn't just settle. And was even considering selling my Infrasubs and buying a used SVS sub. But I think if I could find a matching Sound Dynamics THS 15 sub, that I could finally put a stop to all the searching and headaches that this home theater journey has put me through. My problem now, is that I can't find one anywhere on the internet for sale. They're all old posts. I stumbled onto a few used audio sites, but once again, old posts where the sub had already been sold. I attempted to join some Russian audio site because it seemed that they had one for sale. But even with Google Translate I couldn't figure out how to register to the site. My question to the Alcoholics community is, "Do you know of any place or person anywhere in the world that may have one of these subs for sale?" They relatively cheap, and I can't afford an SVS, but I think finding another Sound Dynamics THS 15 will put the cherry on my home theater banana split. PLEASE HELP!!!!